<https://www.hilase.cz/en/publications/cryogenically-cooled-ybygag-ceramic-picosecond-oscillator/>
<http://schema.org/datePublished>
"2021-08-12T08:35:52+00:00"^^<http://schema.org/Date>
<https://www.hilase.cz/en/publications/cryogenically-cooled-ybygag-ceramic-picosecond-oscillator/>